A good spot for Ice of Velious is Tower of Frozen Shadows. MQ2Navigation works well enough there if you put a bunch of mobs on ignore and mess with it a bit. I was running one bot afk there at late hours and there was only 2 other people that came there for the first few days. Then a person looking for Ice of Velious showed up and I was thinking more will do the same as this place is listed on alla as being a good place to find this item. Still a good place to go and run your bot around, although I wouldn't do it afk even at late hours now. I got 38 Ice of Velious in @4 days of running my bot there (probably 30 hours total actual time).
For all the seals, I've been farming enough stuff to make at least 20 of each, although I haven't done the smithing one yet, which looks like it'll be the worse simply because the rare item needed only drops off a very limited amount of mobs, so no doubt that'll be contested for even at late hours. Anyway, once you farm all the crap and get it down to the final combine for task update, you can just combine for update, hail quest NPC for completion and reward, immediately get task again and repeat. So really easy to do a bunch of seals at once.